Pocket-knife.



0. KALLIN.

POCKET KNIFE. APPLICATION FILED JULY 28, 1911.

Patented Nov. 5, 1912.

COLUMBIA PMNOURAPH COHWASHINOTON, D. C.

ATENT @FlQE.

OSCAR KALLIN, OF NEW BRITAIN, CONNECTICUT.

POCKET-KNIFE.

Specification of Letters Patent.

Patented Nov. 5, 1912.

Application filed July 28, 1911. Serial No. 641,159.

To all whom it may concern:

Be it known that I, OsoAR KALLIN, a citizen of the United States,residing at New Britain, in the county of Hartford and State ofConnecticut, have invented certain new and :useful Improvements inPocket-Knives, of which the following is a specification.

My invention relates to improvements in pocket knives, and the objectsof my improvements are simplicity and economy in construction andconvenience and efficiency in use, and has particular reference to theproduction of a handle in one piece, including side plates generallyconforming to the usual form of construction.

In the accompanying drawings :Figure 1 is a side elevation of myimproved pocket knife. Fig. 2 is a rear elevation of the same. Fig. 3 isa sectional View on the line a a of Fig. 1, on an enlarged scale. Fig. 4is a sec-' tional view on the line 3 y of Fig. 2, the blades being shownin side elevation and partly broken away, and one of the blades turnedto the full open position. Fig. 5 is a side elevation of a modification,showing a separate handle scale, and on the same scale as Fig. 1. Fig. 6is a similar view of the same, with the scale removed. Fig. 7 is asimilar view of the handle scale. Fig. 8 is a backview of the handlewith the scale removed. Fig. 9 is a sectional view on the line a .2 ofFig. 6, and on the same scale as Fig. 3.

A is my improved pocket knife and comprises a handle B and blades Cpivotally and operatively connected thereto by means of pivotal pins Dand spring means .permitting of forcibly changing the position of theblades relatively to the handle alternatively as desired to the closed,half open or closed,

and full open positions, and tending to retain the blades in theparticular position to which the same have been placed. The inner end ofthe blade 0 is cut away in the usual manner on the rear side to form theshoulder 14 and the inwardly extending and generally square shaped ear10, having the straight inner edge 11 at right angles to thelongitudinal line of the blade C and the lateral edges 12 parallel tothe said longitudinal line, and provided with a pivotal hole 13 midwaybetween the said lateral edges 12 and fitting the pivotal pin D. Thesaid inner edge 11, lateral edges 12 and shoulder 14 cooperate with thespring in the usual manner in the different relative positions of theblade and handle as mentioned and the said shoulder 14 being operativein the extreme open position. The said handle B comprises a singleintegral body portion having a pair along the greater part of the lengthon each side of the middle, leaving a slot 19 at each end that is openand exposing the rear side of the ends 20 of the spring E. The said backwall 18 is relatively thick along the middle portion and taperedoutwardly toward the ends 21 to provide free operating space for thespring E. As described, the said handle body B constitutes a channelpiece comprising a pair of side plates 15 separated by a slot or space16 and held together by the web 18 which constitutes the back wall andwhich back wall or web is continuous from end to end and is interruptedat the ends, providing the open slots 19 at the ends in extension of thesaid slot 16, and with the pivot holes 17 provided in the ends of theside plates. As described, the said back wall 18 extends longitudinallyalong the back of the handle body and the ends 21 thereof areappreciably inward from the ends of the handle body and also from theposition of the pivotal pins D. I prefer to make the spring as shown,for a two bladed knife, of sheet metal of a thickness suitable for beingreadily admitted in the slot 16, having a straight inner edge 22 and cutaway along the outer edge to form an elongated recess 23 suitable forinclosing the said back wall 18 and providing at the ends of the saidrecess shoulders 2 1 suitable for engaging with the ends 21 of the wall18 and thereby limit the longitudinal movement of the spring E, andforming, at the ends of the spring, heads 25 suitable for filling thesaid slot extensions 19. The overall length of the spring E and thethickness of the body portion 26 are such that the inner edge 22 willengage with the end of the blade in the manner described for holding theblade and changing the position thereof and to provide suitableresiliency to permit turning the blade from one position to the other.

As described, the blades C are operated in an ordinary manner, my handleis made in one piece, the spring is made in one piece, the spring liesloosely in the handle body and is positively prevented from displacementby the cooperation of the handle back and the blades.

My handle bodyas described may be cast or made of sheet materialsuitably punched and shaped.

In the modification A shown in Fig. 5, the handle B is provided withhandle scales F, which extend along the middle portion of the handlebody, the side plates l5 being provided at the ends with bolsters 27.

As shown at 28 in Fig. 6 the said bolsters 27 are undercut and the endof the scale F is correspondingly shaped to prevent lateral separation.

While I prefer a pair of blades in cooperation with a single spring, itis evident that one of the blades can be dispensed with and the sameoperative features for the blade and spring such as described beretained.

It is apparent that some changes from the specific construction hereindisclosed may be made and therefore I do not wish to be understood aslimiting myself to the precise form of construction shown and described,but desire the liberty to make such changes,

Copies of this patent may be obtained for five cents each, by addressingthe in working my invention, as may fairly come within the spirit andscope of the same.

I claim as my invention: In a pocket knife having a handle, a pair ofblades and a spring'E, the said handle comprising a one piece structurehaving a pair of side plates united by a back, the said back beingcontinuous between the ends, provided with a relatively thickened middleportion, and extending along the greater portion of the length of thesaid side plates, the said blades plvotally mounted between the saidside plates and adjacent the ends thereof, and provided with shoulderssuitable for engaging with the said spring, the said spring having astraight edge along the inner side and in abutment with the blades,having a rectangular recess on the outer side loosely inclosing the saidback and forming heads at the ends of the spring and a spring properbetween the said heads having a uniform cross section, and the saidheads relatively short and suitable to serve as an abutment between thesaid shoulders on the blades and the said ends of the back, whereby freemovement of the heads is permitted in opening and closing the blades, apositive stop is provided between the blades and back, and free movementis provided for the spring proper between the said heads.

OSCAR KALLIN.

Witnesses:

LOUIS M. SorIMnrr, SHEFFIELD I-I. CLARKE.

Commissioner of Patents Washington, D. C.

